Revision as of 05:11, 14 October 2011 by (talk) (Diagram)


The goal here is to authenticate a user for the Open-Xchange system from an external system and to safely pass on the received session data to the user´s browser. To do so the external system has to know the user data (username, password) for Open-Xchange in plain text. There are three participants in this process: User, Open-Xchange system ("OX") and External system ("3rd-party").


1. A ReverseProxy-directive has to be set in the OX-/Loadbalancer-Apache


#ReverseProxy to 3rd-party to enable the form-login
ProxyPass /forwardname http://3rdpartydomain.tld
ProxyPassReverse /forwardname http://3rdpartydomain.tld
#enable sslProxy
SSLProxyEngine on

please note that "forwardname" is just an example, this could be anything

2. The necessary apache-module needs to be installed for this directive to work

Typically that is done like this:

ln -s /etc/apache2/mods-available/proxy_http.load /etc/apache2/mods-enabled/proxy_http.load

3. The 3rd-party system accesses the OX-system via the same domainname as the user (e.g. oxdomain.TLD)

4. the 3rd-party system is on the ip-check-whitelist of the OX-system as described here (in "10.2.20. noipcheck.cnf"):

Also the exact parameter-names for the FormLogin can be found here:


This diagram shows the complete process. Just read it naturally from top to bottom and you have the chronological order things need to happen in.


Example for the login-form

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"  "">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta http-equiv="cache-control" content="no-cache">
<script type="text/javascript">
function uuid() {
   function hex(len, x) {
       if (x === undefined) x = Math.random();
       var s = new Array(len);
       for (var i = 0; i < len; i++) {
           x *= 16;
           var digit = x & 15;
           s[i] = digit + (digit < 10 ? 48 : 87); // '0' and 'a' - 10
       return String.fromCharCode.apply(String, s);
   return [hex(8), "-", hex(4), "-4", hex(3), "-", hex(4, 0.5 + Math.random() / 4), "-", hex(12)].join("");
<form action="/ajax/login?action=formlogin&authId=" method="post"  onSubmit="this.action += uuid();">
<label for="login">Username: </label>
<input type="text" name="login" id="login">
<label for="password">Password: </label> <input type="password" name="password" id="password">
<input type="submit" value="Login"> <input type="hidden" name="client" value="com.openexchange.ox.gui.dhtml"> <input type="hidden" name="version" value="Form Login"> <input type="hidden" name="autologin" value="true"> <input type="hidden" name="uiWebPath" value="/ox6/index.html"> </form> </body> </html>